Thank you! I managed it with this function - for a data fram with x and y
coordinates:
anglefun-function(x,y,unit=degrees) {x.new-outer(x,x,-);
y.new-outer(y,y,-);angles-atan2(x.new,y.new);diag(angles)-NA;if(unit
== degrees)
return(180*angles/pi)
if (unit == radians)
return(angles)}
returns a
Hi everyone,
i have a matrix of points and want to calculate the direction and length of
each vector between the points.
I can easily calculate the length with dist(testdata), but is their a function
that returns a matrix of the direction of the vectors between points (angles
0-360°)?
Le samedi 28 mars 2009 à 16:06 +, Wanja Mathar a écrit :
Hi everyone,
i have a matrix of points and want to calculate the direction and length of
each vector between the points.
I can easily calculate the length with dist(testdata), but is their a
function that returns a matrix of
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